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学生信息处理系统

Java程序：学生数据读取与存储

以下是基于Java语言的学生数据处理程序，该程序用于读取多个学生的成绩信息，计算平均值，并将结果存储到文件中。

文件操作示例代码

public class MainStudentData {

public static void main(String[] args) {
    Student[] students = new Student[5];
    Scanner scanner = new Scanner(System.in);
    for(int i = 0; i < students.length; i++) {
        System.out.println("请输入第" + (i + 1) + "个学生学号");
        String id = scanner.nextLine();
        System.out.println("请输入姓名");
        String name = scanner.nextLine();
        System.out.println("请输入语文成绩");
        int chinese = scanner.nextInt();
        System.out.println("请输入数学成绩");
        int math = scanner.nextInt();
        System.out.println("请输入英语成绩");
        int english = scanner.nextInt();
        Student student = new Student();
        student.setStudentId(id);
        student.setName(name);
        student.setChinese(chinese);
        student.setMath(math);
        student.setEnglish(english);
        student.setAverage((chinese + math + english) / 3.0);
        students[i] = student;
    }
    try {
        File scoreFile = new File("Score.txt");
        if(!scoreFile.exists()) {
            scoreFile.createNewFile();
        }
        FileOutputStream fileOutputStream = new FileOutputStream(scoreFile);
        OutputStreamWriter writer = new OutputStreamWriter(fileOutputStream, "gbk");
        writer.write("学号\t姓名\t语文\t数学\t英语\t平均值\t\r\n");
        for(int i = 0; i < students.length; i++) {
            Student student = students[i];
            writer.write("\r\n");
            writer.write(student.getStudentId() + "\t");
            writer.write(student.getName() + "\t");
            writer.write(String.valueOf(student.getChinese()) + "\t");
            writer.write(String.valueOf(student.getMath()) + "\t");
            writer.write(String.valueOf(student.getEnglish()) + "\t");
            writer.write(String.valueOf(student.getAverage()) + "\t");
            writer.write("\r\n");
        }
        writer.flush();
    } catch(FileNotFoundException e) {
        e.printStackTrace();
    } catch(UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch(IOException e) {
        e.printStackTrace();
    } finally {
        try {
            writer.close();
            fileOutputStream.close();
        } catch(Exception e) {
            e.printStackTrace();
        }
    }
}

}

学生类

public class Student {

private String id;
private String name;
private int math;
private int chinese;
private int english;
private double avg;
public Student() {
    super();
}
public Student(String id, String name, int chinese, int math, int english) {
    this.id = id;
    this.name = name;
    this.chinese = chinese;
    this.math = math;
    this.english = english;
    theAvg = (chinese + math + english) / 3.0;
}
public String getStudentId() {
    return this.id;
}
public void setStudentId(String id) {
    this.id = id;
}
public String getName() {
    return this.name;
}
public void setName(String name) {
    this.name = name;
}
public int getChinese() {
    return this.chinese;
}
public void setChinese(int chinese) {
    this.chinese = chinese;
}
public int getMath() {
    return this.math;
}
public void setMath(int math) {
    this.math = math;
}
public int getEnglish() {
    return this.english;
}
public void setEnglish(int english) {
    this.english = english;
}
public double getAverage() {
    return this.avg;
}
public String toString() {
    return "Student [id=" + id + ", name=" + name + ", chinese=" + chinese + ", math=" + math + ", english=" + 
            english + ", avg=" + avg + "]";
}

}

以上代码展示了一个学生信息管理系统，主要功能是读取学生的学号、姓名及三门课成绩信息，计算平均成绩，并将结果保存到指定的文本文件中。

注：请确保在使用上述代码时，相应的包和必要的权限已经申请，并且已创建好"Score.txt"文件或允许程序写入该路径。建议在实际运行前仔细检查路径配置和相关权限设置。